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I have a Toshiba laptop that was running Windows 8. I installed Ubuntu 12.10 and deleted Windows 8 in the install. Ubuntu worked fine until I shut the PC down. When I tried to start it again it would just go to a black screen. If I take the battery out of the PC and put it back in and turn the PC on Ubuntu will work.

How do I fix this problem?

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I have a similar problem with one HP Laptop (Pavilion dv6) for more then 2 years look here. What I have discovered so far:

1) Buying another battery doesn't fix the problem,
2) Taking out the battery with the cable connected also doesn't fix it,
3) I have to be careful not to disconnect the power cable when the laptop is shutting down,
4) I have to be super careful not to connect the power cable when the laptop is booting up (but connecting it after the boot seems ok),
5) I got more successful boots with the power cable disconnected,
6) I tried some grub acpi configurations without success.

So I've settled. The two most important steps seems to be the numbers "3" and "4".

Best regards.

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I was going to suggest something along the line of number 6. – wojox Apr 2 '13 at 12:27
Please update initramfs and the tell-me if you keep having that problem. Use "sudo update-initramfs -u" – Celso Apr 13 '13 at 1:40
I have found some information here .I will be able to test this on Wednesday, but I am thinking that I already have tested three brand new installations (11.04, 11.10, 12.04), and I can't see why sudo update-initramfs -u should work. Any tips? – desgua Apr 14 '13 at 1:19
I've just updated the initramfs let's hope for the best ;-) – desgua Apr 22 '13 at 11:05
One week has passed without this issue. Let's keep observing. – desgua Apr 29 '13 at 12:37

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